Patents by Inventor John Himmelreich

John Himmelreich has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20100303110
    Abstract: Particular embodiments of the present disclosure bring an SHG crystal, or other type of wavelength conversion device, into close proximity with a laser source to eliminate the need for coupling optics, reduce the number of package components, and reduce package volume. According to one embodiment of the present disclosure, an optical package is provided comprising a laser source subassembly comprising a laser base and a wavelength conversion device subassembly comprising a converter base. The bonding interface of the laser base is bonded the complementary bonding interface of the converter base such that the laser output face can be proximity-coupled to the converter input face at an predetermined interfacial spacing x. Additional embodiments are disclosed and claimed.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Inventors: Venkata Adiseshaiah Bhagavatula, Satish Chandra Chaparala, John Himmelreich, Lawrence Charles Hughes, JR.
  • Publication number: 20100303109
    Abstract: Particular embodiments of the present disclosure bring an SHG crystal, or other type of wavelength conversion device, into close proximity with a laser source to eliminate the need for coupling optics, reduce the number of package components, and reduce package volume. According to one embodiment of the present disclosure, an optical package is provided comprising a laser source and a wavelength conversion device. The laser source is positioned such that the output face of the laser source is proximity-coupled to a waveguide portion of the input face of the wavelength conversion device. The input face of the wavelength conversion device comprises an ?-cut facet and ?-cut facet. The ?-cut facet of the input face is oriented at a horizontal angle ?, relative to the waveguide of the wavelength conversion device to permit proximity coupling of the output face of the laser source and the input face of the wavelength conversion device.
    Type: Application
    Filed: May 26, 2009
    Publication date: December 2, 2010
    Inventors: Venkata Adiseshaiah Bhagavatula, Satish Chandra Chaparala, John Himmelreich, Lawrence Charles Hughes, JR.
  • Publication number: 20100129647
    Abstract: A method of assembling optoelectronic and/or photonic components, said method comprising: (i) providing at least two optoelectronic and/or photonic components; (ii) aligning and situating these components relative to one another and in close proximity with one another so as to: (a) provide optical coupling between these components; and (b) maintain the distance d between the adjacent parts of these components, where d is 0 to 100 ?m; (iii) adhering these components to one another with while maintaining optical coupling therebetween; and (iv) laser welding these components together while maintaining optical coupling therebetween.
    Type: Application
    Filed: November 24, 2008
    Publication date: May 27, 2010
    Inventors: Venkata Adiseshaiah Bhagavatula, Roy Joseph Bourcier, Satish Chandra Chaparala, John Himmelreich
  • Patent number: 7228033
    Abstract: A spherical lens formed by fusing a generally homogenous glass lens blank to the distal end of an optical fiber, heating and tensioning the lens blank to separate it in two segments with the segment attached to the optical fiber defining a tapered end, and heating the lens blank above its softening point so that the spherical lens forms. The lens blank is fabricated from a 4 weight percent borosilicate glass having a softening point less than that of the core of the optical fiber. The lens member defines a throat region adjacent the optical fiber whose cross-sectional dimension is substantially greater than the diameter of the optical fiber, but substantially less than the diameter of the spherical lens.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: June 5, 2007
    Assignee: Corning Incorporated
    Inventors: Venkata A. Bhagavatula, John Himmelreich, Gregory E. Williams, Ljerka Ukrainczyk, Robert S. Wagner
  • Patent number: 7099535
    Abstract: A fiber lens includes a graded-index lens, a single-mode fiber disposed at a first end of the graded-index lens, and a refractive lens having a hyperbolic or near-hyperbolic shape disposed at a second end of the graded-index lens to focus a beam from the single-mode fiber to a diffraction-limited spot.
    Type: Grant
    Filed: October 31, 2003
    Date of Patent: August 29, 2006
    Assignee: Corning Incorporated
    Inventors: Venkata A. Bhagavatula, John Himmelreich, Nagaraja Shashidhar
  • Patent number: 6963682
    Abstract: A multi-lens apparatus for altering the mode field of an optical signal is disclosed. The apparatus includes an optical fiber having a core region defining an optical axis and a GRIN-fiber lens positioned in relation to one end of the optical fiber. A biconic lens including an external surface defined by two different curves disposed substantially orthogonal to one another, a major curve C1 and a minor curve C2, with C1 and C2 intersecting at or near the optical axis is positioned in relation to an end of the GRIN-fiber lens remote from the fiber. A method of manufacturing a multi-lens apparatus for altering the mode field of an optical signal, and an optical assembly are also disclosed.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: November 8, 2005
    Assignee: Corning Incorporated
    Inventors: Venkata A. Bhagavatula, Nagaraja Shashidhar, John Himmelreich
  • Patent number: 6904197
    Abstract: An apparatus for altering the mode field of an optical signal is disclosed. The apparatus includes a GRIN-fiber lens and a reflective surface disposed at one end of the GRIN-fiber lens, the reflective surface configured to cooperate with the GRIN-fiber lens to redirect the path of the optical signal directed against the reflective surface. A method of manufacturing an apparatus for altering the mode field of an optical signal and an optical assembly are also disclosed.
    Type: Grant
    Filed: July 23, 2002
    Date of Patent: June 7, 2005
    Assignee: Corning Incorporated
    Inventors: Venkata A. Bhagavatula, Nagaraja Shashidhar, John Himmelreich
  • Publication number: 20050069257
    Abstract: A fiber lens includes a multimode fiber and a refractive lens disposed at an end of the multimode fiber. The refractive lens focuses a beam from the multimode fiber into a diffraction-limited spot. In one embodiment, a graded-index is interposed between the multimode fiber and the refractive lens. In one embodiment, the combination of the graded-index and the refractive lens enables extreme anamorphic lens characteristics.
    Type: Application
    Filed: September 23, 2004
    Publication date: March 31, 2005
    Inventors: Venkata Bhagavatula, John Himmelreich, Phyllis Markowski, Michael Rasmusen, Nagaraja Shashidhar, Luis Zenteno
  • Publication number: 20040126059
    Abstract: A fiber lens includes a graded-index lens, a single-mode fiber disposed at a first end of the graded-index lens, and a refractive lens having a hyperbolic or near-hyperbolic shape disposed at a second end of the graded-index lens to focus a beam from the single-mode fiber to a diffraction-limited spot.
    Type: Application
    Filed: October 31, 2003
    Publication date: July 1, 2004
    Inventors: Venkata A. Bhagavatula, John Himmelreich, Nagaraja Shashidhar
  • Publication number: 20030165291
    Abstract: An apparatus for altering the mode field of an optical signal is disclosed. The apparatus includes a GRIN-fiber lens and a reflective surface disposed at one end of the GRIN-fiber lens, the reflective surface configured to cooperate with the GRIN-fiber lens to redirect the path of the optical signal directed against the reflective surface. A method of manufacturing an apparatus for altering the mode field of an optical signal and an optical assembly are also disclosed.
    Type: Application
    Filed: July 23, 2002
    Publication date: September 4, 2003
    Inventors: Venkata A. Bhagavatula, Nagaraja Shashidhar, John Himmelreich
  • Publication number: 20030165292
    Abstract: A multi-lens apparatus for altering the mode field of an optical signal is disclosed. The apparatus includes an optical fiber having a core region defining an optical axis and a GRIN-fiber lens positioned in relation to one end of the optical fiber. A biconic lens including an external surface defined by two different curves disposed substantially orthogonal to one another, a major curve C1 and a minor curve C2, with C1 and C2 intersecting at or near the optical axis is positioned in relation to an end of the GRIN-fiber lens remote from the fiber. A method of manufacturing a multi-lens apparatus for altering the mode field of an optical signal, and an optical assembly are also disclosed.
    Type: Application
    Filed: July 23, 2002
    Publication date: September 4, 2003
    Inventors: Venkata A. Bhagavatula, Nagaraja Shashidhar, John Himmelreich
  • Publication number: 20020176644
    Abstract: The invention relates to a polarization combiner/splitter. The polarization combiner/splitter includes a first ferrule, a first optical fiber assembly coupled to the first ferrule and a second optical fiber assembly coupled to the first ferrule. The polarization combiner/splitter also includes a walk-off crystal coupled to the first ferrule. A second ferrule is coupled to the walk-off crystal; and a third optical fiber assembly coupled to the second ferrule. The first optical fiber assembly includes a first fiber GRIN lens coupled to a first polarization mode maintaining optical waveguide fiber. The second optical fiber assembly includes a second fiber GRIN lens coupled to a second polarization mode maintaining optical waveguide fiber. The third optical fiber assembly includes a third fiber GRIN lens and a first single mode optical waveguide fiber.
    Type: Application
    Filed: March 14, 2002
    Publication date: November 28, 2002
    Inventors: Venkata A. Bhagavatula, John Himmelreich, Gaeyoun Kim, Kamjula P. Reddy, Gregory E. Williams, Bryan J. Wolfe
  • Publication number: 20020009261
    Abstract: A spherical lens formed by fusing a generally homogenous glass lens blank to the distal end of an optical fiber, heating and tensioning the lens blank to separate it in two segments with the segment attached to the optical fiber defining a tapered end, and heating the lens blank above its softening point so that the spherical lens forms. The lens blank is fabricated from a 4 mole percent borosilicate glass having a softening point less than that of the core of the optical fiber. The lens member defines a throat region adjacent the optical fiber whose cross-sectional dimension is substantially greater than the diameter of the optical fiber, but substantially less than the diameter of the spherical lens.
    Type: Application
    Filed: March 19, 2001
    Publication date: January 24, 2002
    Inventors: Venkata A. Bhagavatula, John Himmelreich, Gregory E. Williams, Ljerka Ukrainczyk, Roberts S. Wagner